Bug 1517442 - [marionette] Use current instead of default startup time in raise_for_port r=whimboo

Differential Revision: https://phabricator.services.mozilla.com/D16609

--HG--
extra : moz-landing-system : lando

testing/marionette/client/marionette_driver/marionette.py

@@ -698,7 +698,7 @@ class Marionette(object):
             attempt will be aborted.
         """
         if timeout is None:
-            timeout = self.DEFAULT_STARTUP_TIMEOUT
+            timeout = self.startup_timeout
 
         runner = None
         if self.instance is not None: